Improvement in scroll-saws



N UNITED NSTATES A PATENT OEEICJEa WILLIAM H. BRIGGS, OF WOONSOCKET, RHODE ISLAND.

IMPROVEMENT IN SCROLL-SAWS.

Specification forming part of Letters Patent No. 170,048, dated November 16, 1875; application tiled December 5, 1874.

To all lwhom @t may concern: ,f'

Beit known that I, WILLIAM H. Bnrees, of Woonsocket, in the county of (Pr/evidence and State of Rhode Island, have`invented a new and valuable Improvement in Scroll-Saws 5 and I do hereby declarethat the following is a full, clear, and exact description of the construction and operation of the same, reference being had to theannexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure 1 of the drawing is a representation of a plan view of my scroll-saw in parts bro ken away, and Fig. 2 is a longitudinal sectional view of the same.

This invention has relation to handsaws which are especially designed for sawing scroll-work; and the nature of my invention consists in a springfralne, having one of its limbs adjustable on the saw-back, in combination with rotating stems, to which the saw is attached, a hooking attachment for the saw, and a straining-nut 011 one of said stems. whereby great facilitykof adjustment and use of the saw is obtained.

In the accompanying drawings, A designates the back of the saw-frame, which is a round rod of metal of suitable length, having its upper side iiattened. To one end of this bar a limb, B, is rigidly secured, having a tube, a, on one end, in which a stem, b, is free to turn, on which stem a handle,.(}, is rigidlyv secured. The stem b has a slot in one end, and a perforation through it at right angles to the slot. It is to this end of stem b that one end of the saw D is secured by a pin, e. Bl designates another limb of the saw, which has tubes ff on its extremities, one of which, f, receives through it one end of the back A, and is rigidly, but removably, secured to this rod by means of a set-screw, g. The tube f receives through it `a stem, b', which, like stem b, is free to turn about its axis, and which is screw-threaded to receive a strainingnut, h, and a jam-nut, h. This stem b is slotted, and has a pin, t', permanently fixed to it at right'angles to the slot, and passing through the latter. That end of the saw D which is attached to the stem b has an oblique slot, j, in it, forming a kind of hook, which receives the pin i, and thus attaches this end of the saw to the said stem.

Among many advantages attending my improved saw I will state, first, that the limb B, with its stem b', can be readily adjusted for saw-blades of different lengths by simply loosening the set-screw g. Second, the stem b is provided with a nut which will allow the saw to be strained and held under any desired degree of tension, whether theV saw be a long one or a s hort one. Third, in combination with the above advantages named, the limbs B B and the back A are suficienftlyelastic to allow, by a slight compression of the two limbs B B, the slotted end of the saw to be detached from its pin z'.

It will be observed that, incidental to my construction of saw-frame, the saw can be turned independently of the frame while making scroll-work.

I am. aware that a saw-frame provided with vertical adjustable arms, pivoted to an arch connecting-piece, and provided with adjustable screws, as shown in Letters Patent of W. Cotter, dated October l5, 1872, has heretofore been employed, and I therefore disclaim such invention. I am also aware that vsaw-frames have heretofore been employed which are longitudinally adjustable for saws of different lengths, and I therefore lay no claim, broadly, to such adjustable saw-frames.

What I claim as new, and desire to secure by Letters Patent, is-

The saw-frame herein' described, consisting of the arm B, having the arm A and tube a for the recept-ion of the stem b, arm B', provided with tubes ff', stem b', and adjustingscrew g, in combination with the saw D, hav ing a perforation at one end, and an oblique slot at the other end for the reception of pins, whereby the saw'franie may be adjusted to saws of different lengths, and at the saine time may be readily removed, substantially as described.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses. v

WILLIAM H. BBIGGS.

Witnesses:

FRANCIS L. OREILLv, GEORGE A. WILBUR. 

